Anywhere within 500' of a corn dryer is usually covered w/beeswings. Wouldn't radiator blockage be a problem if it were anywhere near the dryer itself? Something has to draw air thru the cooling cools, and along w/that air is going to be beeswings....for a while, then air will no longer flow thru the radiator. At least that's my experience w/beeswings & radiators.